<?php
// app/helpers/http.php
function http_post_form($url, array $fields, array $headers = [], $timeout = 10) {
  $ch = curl_init($url);
  curl_setopt_array($ch, [
    CURLOPT_RETURNTRANSFER => true,
    CURLOPT_POST           => true,
    CURLOPT_POSTFIELDS     => http_build_query($fields),
    CURLOPT_HTTPHEADER     => $headers,
    CURLOPT_TIMEOUT        => $timeout,
  ]);
  $body = curl_exec($ch);
  $code = curl_getinfo($ch, CURLINFO_HTTP_CODE);
  $err  = curl_error($ch);
  curl_close($ch);
  return [$code, $body, $err];
}

function http_post_json($url, array $json, array $headers = [], $timeout = 10) {
  $hdrs = array_merge(['Content-Type: application/json'], $headers);
  $ch = curl_init($url);
  curl_setopt_array($ch, [
    CURLOPT_RETURNTRANSFER => true,
    CURLOPT_POST           => true,
    CURLOPT_POSTFIELDS     => json_encode($json),
    CURLOPT_HTTPHEADER     => $hdrs,
    CURLOPT_TIMEOUT        => $timeout,
  ]);
  $body = curl_exec($ch);
  $code = curl_getinfo($ch, CURLINFO_HTTP_CODE);
  $err  = curl_error($ch);
  curl_close($ch);
  return [$code, $body, $err];
}